I will migrate your data between apps via API integration

M
mcsteel
M
mcsteel
Metin Celik
migrate your data between apps via API integration
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migrate your data between apps via API integration
Full Screen
migrate your data between apps via API integrationmigrate your data between apps via API integration

About this gig

Struggling to move data between systems? I turn hours of manual copy-paste into a 5-minute automated migration.


What I deliver:

I build custom scripts that pull data from your source (CSV, Excel, Google Sheets, databases, or any API) and push it into your target system clean, validated, and error-free.


Common use cases:

Excel or CSV to CRM, calendar, or booking tools. Google Sheets to Notion, Airtable, or databases. Legacy system to modern SaaS platform. Any REST API to any REST API.


Why work with me:

20+ years of professional software engineering. I use C# and .NET for rock-solid migration scripts with error handling, retry logic, and detailed logs.


I also speak German and Turkish fluently.


Message me before ordering so I can give you an accurate quote.

  • Programming language

    • C#

  • Expertise

    • Algorithms & Data structures
    • Debugging
    • Performance
    • Design
    • Databases

  • Frontend framework

    • Angular
    • Bootstrap
    • Flutter
    • React.js

  • Backend framework

    • Next.js

  • AI & low/no code builders

    • Lovable

Get to know Metin Celik

Metin Celik
5.0(4)
  • FromGermany
  • Member sinceMar 2011
  • Avg. response time4 hours

  • Languages

    English, German, Turkish, Spanish
Software engineer with 20+ years of professional experience in object-oriented development for industry. I build reliable, production-grade solutions — not quick hacks. Daily work: C#, .NET, TypeScript, Java, React, API integrations, data migrations, and custom tools. I have shipped large-scale enterprise software through the full lifecycle — from requirements to deployment. What I offer: Data migration between any systems via REST API. Workflow automation that saves you hours. Custom software tools at fixed prices. Clean code, solid error handling, and documentation.

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